Improvement in saw-mills



J. M. REES. 3S hee ts--Sheet1 Improvement in Saw-MiHs. No. 129,495,Patented July 16, 1872.

J. M. REES. 3Sheets--Sheet2.

Improvement .in Saw-Mills. No. 129,495. Patentedluly 16,1872

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No. 129,495. Patented July 16,1872.

E J; 90 N UNITED STATES PATENT OFFICE.

JAMES M. REES, or soon, OHIO.

IMPROVEMENT IN SAW-MILLS.

Specification forming part of Letters Patent No. 129,495, dated July 16,1872.

Specification describing a new Improvement in Saw-Mills, invented byJAMES M. REES, of (Bfilott, in the county of Adams and State of Figure 1represents a side elevation, partly in section, of my improvedsawing-machine. Fig. 2 is a plan view, partly in section, of the same;and Fig. 3, a vertical transverse section of the same.

Similar letters of reference indicate corresponding parts.

The invention consists in a certain improvement upon saw-mills, whichwill first be fully described and then pointed out in the claim.

A in the drawing represents the middle section of the screw-frame. B Bare the end sections of the same. When all these sections are united, asin Fig. 1, they form continuous parallel rails a a, for the support ofthe sawcarriage O, the several portions of said rails being respectivelysecured to the sections A and B B. At their upper parts the sections B Bare fastened to the middle part A by means of pins 1) b, fitted throughconnectingstraps d. Inclined braces e, projecting inwardly from thesections B, enter mortises in the ends of A and serve to sustain the endsections in proper position. Whenever the frame is to be separated fortransportation the pins 1) b are withdrawn, and the ends detached to beconveniently placed on a suitable vehicle. Projecting wheel-supports oraxleboxes ff are or may be formed at the sides of the frame A, near thelower part thereof, to permit the attachment of wheels, and thusfacilitate the transportation of the machine without other vehicles. Thesaw-carriage (J rests on the rails a a and carries a toothed rack, g,which gears into a pinion, h, on a transverse shaft, D, hanging in theframe A. The shaft D carries at its outer end a toothed wheel, 03, andalso a pulley, j. E is the driving-shaft of the machine, hung in thelower part of the frame A, and provided with the crank-wheel l, forconnecting with the pitman m, that moves the saw F. Upon the shaft E isalso mounted a pulley, 'n, and a graduated pulley, 0. Abelt connects thepulley o with a similar graduated pulley, p, on a shaft G, from which apinion, q, meshes into the toothed wheel 6. By this connection motion istransmitted from the driving-shaft E to the shaft D with greater or lessspeed, according to the position of the belt on the graduated pulleys tomove the sawcarriage. The shaft G hangs in adjustable supports, and can,by a lever, r, be carried out of gear with the toothed wheel 1; toarrest the saw-carriage, and when the same is to be re versed in itsmotion. The return motion of the saw-carriage is produced by means of abelt that passes over the pulleys j and a, and that is slack while thecarriage is moved by the shaft G, but drawn tight by a vibrating roller,8, when to be thrown into action. The saw-carriage O carries thehead-block H and the tail-block I, each moving in transverse groovedguides, as shown, and each toothed on the under side, so that they maygear into pinions t and a respectively. The pinion t, under the headblock, is mounted upon a sleeve, V, which turns loose on a longitudinalshaft, J, that hangs in the said carriage, as shown. The sleeve V isalso provided with a ratchet-wheel, to, which can be turned by a pawland lever, L. The pinion a, under the ever, they are to be movedindependent of each other, the levers are separately handled. Thetail-block I is provided with hooks yyfor holding the log at the sides,and with a spike, z, for entering the end of the log and holding itsteady. The saw F is, at the lower end, connected with the pitman m. Itsupper end works between parallel vertical guides a a that are secured tohorizontal cross-beams I) W. The ends of these beams are fastened to theupper ends of the fender-posts N N. The fender-posts are, at their lowerends, pivoted to the lower rail of the frame A, as at d in the drawing,and can be inclined more or less on their pivots, and locked, by wedgesor screws 6 at the upper part of the frame A. The rake or sweep of thesaw is regulated by the inclination of these pivoted fender-posts. Alongthe vertical guides a a are applied vertically-adjustable slides f f,which, at their lower ends, carry the upper saw-guides g g.

' These slides fif are set up or down in order reaching the pittnanconnection and clogging the joints.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- The pivoted fender-posts N N, carrying the "uppersaw-guides, and made adjustable to regulate the sweep or rake of thesaw, as set forth.

JAMES M. REES.

Witn esses T. 0. DOWNY, JAMES E. SMITH.

